From: Jacob Lifshay <programmerjake@gmail.com>
Date: Mon, 4 Dec 2023 08:18:10 +0000 (-0800)
Subject: ISACaller: implement real_addr pseudo-code helper
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b23f7f3da3ae5de42de64b128019cccd598fbba3;p=openpower-isa.git

ISACaller: implement real_addr pseudo-code helper
---

diff --git a/openpower/isa/fixedsync.mdwn b/openpower/isa/fixedsync.mdwn
index 44a6b022..979a6074 100644
--- a/openpower/isa/fixedsync.mdwn
+++ b/openpower/isa/fixedsync.mdwn
@@ -58,7 +58,7 @@ Pseudo-code:
     EA <- (RA|0) + (RB)
     RESERVE <- 1
     RESERVE_LENGTH <- 4
-    RESERVE_ADDR <- EA # real_addr(EA)
+    RESERVE_ADDR <- real_addr(EA)
     RT <- [0]*32 || MEM(EA, 4)
 
 Special Registers Altered:
diff --git a/src/openpower/decoder/isa/caller.py b/src/openpower/decoder/isa/caller.py
index 6a452f0a..7806ccd2 100644
--- a/src/openpower/decoder/isa/caller.py
+++ b/src/openpower/decoder/isa/caller.py
@@ -1505,6 +1505,14 @@ class ISACaller(ISACallerHelper, ISAFPHelpers, StepLoop):
     def REAL_PAGE_SIZE(self):
         return self.real_page_size
 
+    def real_addr(self, EA):
+        """ get the "real address to which `EA` maps"
+
+        Specified in PowerISA v3.1B Book II Section 1.7.2.1 page 1049 (1075)
+        """
+        # FIXME: translate EA to a physical address
+        return EA
+
     @property
     def FPSCR(self):
         return self.fpscr